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Die Drehtür wird patentiert episode artwork

EPISODE · Dec 21, 2017 · 3 MIN

Die Drehtür wird patentiert

from Das Kalenderblatt · host Thomas Grasberger

Unzählige Male geht der Mensch im Leben durch eine Drehtür, für die am 22. Dezember 1881 ein gewisser Herr Bockhacker das deutsche Patent erhielt.

Episode metadata supplied by the publisher feed · Published Dec 21, 2017

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Die Drehtür wird patentiert

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